Sodium Nitrite is a chemical compound with the formula NaNO2. It appears as a white or yellowish crystalline powder and is commonly used as a food preservative, particularly in cured meats, to prevent bacterial growth and enhance color. In addition to its use in food, sodium nitrite has applications in various industries, including the production of dyes and pharmaceuticals. It is also used in the manufacturing of nitric oxide, which has medical uses, particularly in treating certain heart conditions. However, sodium nitrite can be toxic in high doses, so it must be handled with care.